My personal opinion...Vortech is great, I have one. The low end power is the negative. The roots style has more lower torque. But, if it already has a vortech and was properly installed, I would certainly keep it. Value shouldn't change too much in either direction in my opinion. Again, that is if it was installed properly. Hp will range from 350 - 400 at the wheels depending on a couple factors.
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429 hp w/Vortech V1
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